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| author | Michael Matz <matz@suse.de> | 2005-05-02 04:22:45 +0000 |
|---|---|---|
| committer | Michael Matz <matz@gcc.gnu.org> | 2005-05-02 04:22:45 +0000 |
| commit | b2f97e4a12858733fc4977859febecd144acb8dd (patch) | |
| tree | 81e0ec0700839598638506aadcfb471636db87e6 /gcc/c-common.h | |
| parent | f8f9fb4526bea97382af2024b7b268725d544239 (diff) | |
| download | gcc-b2f97e4a12858733fc4977859febecd144acb8dd.zip gcc-b2f97e4a12858733fc4977859febecd144acb8dd.tar.gz gcc-b2f97e4a12858733fc4977859febecd144acb8dd.tar.bz2 | |
re PR c++/19542 (attribute(sentinel) has problems with C++ __null)
PR c++/19542
* c-common.c (c_common_nodes_and_builtins): Create global null_node.
(warn_strict_null_sentinel): Define.
(check_function_sentinel): Check for null_node as valid sentinel too.
* c-common.h (c_tree_index): Added CTI_NULL.
(null_node) Define global_tree[CTI_NULL].
(warn_strict_null_sentinel): Declare.
* c-opts.c: (c_common_handle_option): Handle -Wstrict-null-sentinel.
* c.opt: (Wstrict-null-sentinel): New C++ option.
* doc/invoke.texi (C++ Options): Document -Wstrict-null-sentinel.
* cp-tree.h (cp_tree_index): Remove CPTI_NULL, to be defined in C
common frontend.
(null_node): Remove.
* lex.c (cxx_init): Move null_node initialisation to C common frontend.
* g++.dg/warn/sentinel.C: New testcase for __null sentinels added.
From-SVN: r99091
Diffstat (limited to 'gcc/c-common.h')
| -rw-r--r-- | gcc/c-common.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/c-common.h b/gcc/c-common.h index 5c9330b..c43531b 100644 --- a/gcc/c-common.h +++ b/gcc/c-common.h @@ -159,6 +159,8 @@ enum c_tree_index CTI_VOID_ZERO, + CTI_NULL, + CTI_MAX }; @@ -203,6 +205,9 @@ struct c_common_identifier GTY(()) /* A node for `((void) 0)'. */ #define void_zero_node c_global_trees[CTI_VOID_ZERO] +/* The node for C++ `__null'. */ +#define null_node c_global_trees[CTI_NULL] + extern GTY(()) tree c_global_trees[CTI_MAX]; /* In a RECORD_TYPE, a sorted array of the fields of the type, not a @@ -570,6 +575,12 @@ extern int flag_threadsafe_statics; extern int warn_implicit; +/* Warn about using __null (as NULL in C++) as sentinel. For code compiled + with GCC this doesn't matter as __null is guaranteed to have the right + size. */ + +extern int warn_strict_null_sentinel; + /* Maximum template instantiation depth. This limit is rather arbitrary, but it exists to limit the time it takes to notice infinite template instantiations. */ |